Title: Laminated insulated hot drink cup

Abstract: An insulated, decorative hot drink cup for hot coffee or the like is provided which can be grasped and drunk from without fear that the user's fingers will be burned. The cup includes an inner, integral, synthetic resin cup member having a series of spaced, exterior, longitudinally extending, triangular in cross section ribs on the sidewall thereof, and an outer decorative paper overwrap permanently applied over and in contact with the ribs. This structure defines a series of discrete, juxtaposed, dead air chambers or cells in the cup assembly sidewall for maximum heat insulation, and the thermally minimal, essentially line contact between the rib apices and overwrap enhances this effect. An uppermost circumferential bead formed on the cup member provides a further seal and prevents passage of liquid between the overwrap and member sidewall.

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Inventors: Watkins, John B. (Independence, MO, US)
Black, Glen N. (Osage City, KS, US)

Application Number: 089762
Filing Date: 1979-10-31
Publication_date: 1981-04-14
Assignee: Hallmark Cards Incorporated (Kansas City, MO)
Primary Class(es): 229/404 220/592.17, 220/592.22, 220/918, D7/531
Other Classes:
US Patent Ref:

Re25618	Jul, 1964	Goodman	229/1.
2266828	Dec, 1941	Sykes	229/1.
2675954	Apr, 1954	Vogel	229/1.
3169689	Feb, 1965	Schwartz	229/1.
3237834	Mar, 1966	Davis et al.	229/1.
3456860	Jul, 1969	Janninck	229/1.
3759437	Sep, 1973	Amberg	229/1.

Other Refs: 6138571085536

Feb, 1961	CA
Oct, 1967	GB

Primary Examiner: Lowrance, George E.
Assistant Examiner:
Attorney: Schmidt, Johnson, Hovey & Williams